Over the weekend at some point, my dev site lost 75% of the uploaded images. A lot are marked 0 in the database, and don't appear to exist on the physical file system anymore. I don't see anything in the log pertaining as to what or why, and nothing major was deployed on the previous Friday that could have caused this.

Since that point, I have set "Delete Orphaned files after" setting in Drupal core to "Never", because I could not think of anything else that may have caused this. All of the fields are media fields hooked up to Media Entity and Media Entity Image.